/*
 * Copyright (c) 2025, 2025, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.oracle.truffle.espresso.vmaccess;

import org.graalvm.polyglot.Value;

import com.oracle.truffle.espresso.jvmci.meta.AbstractEspressoResolvedJavaField;

import jdk.vm.ci.common.JVMCIError;
import jdk.vm.ci.meta.JavaType;
import jdk.vm.ci.meta.UnresolvedJavaType;

final class EspressoExternalResolvedJavaField extends AbstractEspressoResolvedJavaField {
    private final Value fieldMirror;
    private final int flags;

    EspressoExternalResolvedJavaField(EspressoExternalResolvedInstanceType holder, Value fieldMirror) {
        super(holder);
        this.fieldMirror = fieldMirror;
        this.flags = fieldMirror.getMember("flags").asInt();
    }

    private EspressoExternalVMAccess getAccess() {
        return ((EspressoExternalResolvedInstanceType) getDeclaringClass()).getAccess();
    }

    @Override
    protected int getFlags() {
        return flags;
    }

    @Override
    public int getOffset() {
        return fieldMirror.getMember("offset").asInt();
    }

    @Override
    protected String getName0() {
        return fieldMirror.getMember("name").asString();
    }

    @Override
    protected JavaType getType0(UnresolvedJavaType unresolved) {
        String name = fieldMirror.getMember("type").asString();
        return getAccess().lookupType(name, getDeclaringClass(), false);
    }

    @Override
    protected int getConstantValueIndex() {
        throw JVMCIError.unimplemented();
    }

    @Override
    protected byte[] getRawAnnotationBytes(int category) {
        throw JVMCIError.unimplemented();
    }

    @Override
    protected boolean equals0(AbstractEspressoResolvedJavaField that) {
        if (that instanceof EspressoExternalResolvedJavaField espressoField) {
            return fieldMirror.equals(espressoField.fieldMirror);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return fieldMirror.hashCode();
    }

    public Value readValue(Value receiver) {
        return fieldMirror.invokeMember("read", receiver);
    }
}
